Structural thermal external pressure test system of aircraft cabin sections and method thereof

Abstract

The invention discloses a structural thermal external pressure test system of aircraft cabin sections. The structural thermal external pressure test system comprises a thermal load loading system, anexternal pressure loading system and an axial loading system, wherein the thermal load loading system comprises a heater for heating a test part; the external pressure loading system comprises a leather bag; the shape of the leather bag is as same as that of the outer wall of the test part; the leather bag is coated on the periphery of the test part according to the shape; liquid is added into theleather bag so as to control the pressure; the axial loading system comprises a servo oil cylinder, a connection rod and a spherical hinge; the servo oil cylinder is fixed above the test part; one end of the connection rod is connected with the servo oil cylinder; the other end of the connection rod is connected with the spherical hinge; the servo oil cylinder is started to drive the connection rod move up or down so as to drive the spherical hinge to axially apply axial tension or pressure to the direction of the test part. Through the structural thermal external pressure test system and themethod thereof, the problem of applying the thermal load, the axial tensile load and the external pressure load to the test part when carrying out thermal external pressure test and especially applying the axial tensile load when applying the thermal load and the external pressure load is solved.

Description

technical field [0001] The invention belongs to the field of ground simulation tests of aircraft such as missiles and rockets, and particularly relates to thermal and external pressure tests of aircraft structures, aiming at realizing combined application of thermal load, axial load and uniform external pressure load of the aircraft. Background technique [0002] Structural thermal external pressure test is a ground simulation test technology developed to solve the problem of thermal intensity during aircraft flight. The ground test for the purpose of strength, thermal stiffness and heat resistance performance is an indispensable and important link in the process of aircraft development. [0003] The traditional thermal external pressure test uses high-temperature heat transfer oil to apply thermal load and uniform external pressure load. During the test process, the entire test device needs to be sealed to realize the external pressure load. The traditional thermal external...

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Problems solved by technology

[0003] The traditional thermal external pressure test uses high-temperature heat transfer oil to apply thermal load and uniform external pressure load. During the test process, the entire test device needs to be sealed to realize the external pressure load. The traditional thermal external pressure test has the following shortcomings: The test failed due to poor sealing; 2) The high-temperature heat transfer oil has certain safety hazards during the test, and the heating temperature can only be achieved at about 200°C; 3) In the traditional thermal external pressure test, the axial tensile load will cause The seal is not tight enough to apply external pressure load, so the traditional thermal external pressure test cannot apply axial tensile load

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